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Friday, April 20, 2018, 11:46 p.m.

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Scrutiny of brains tags teen maturity

Listening in on the electrical currents of teenagers’ brains during sleep, scientists have begun to hear the sound of growing maturity. It happens most intensively between the ages of 12 and 16 ½. After years of frenzied fluctuation, the brain’s electrical output during the deepest phase of sleep — the delta, or slow-wave phase, when a child’s brain is undergoing its most restorative rest — becomes practically steady.

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